Data files are presented in two formats, text and binary. Both formats for a given file contain the same information. The text file is white-space delimited and can easily be imported into your favorite spreadsheet application (i.e. Microsoft Excel™) for further analysis. The binary format is more useful for programatic access from custom pieces of software.

File Contents Spectral Acceleration Return Period Downloads
Hazard CurvesPeak Ground AccelerationNot Applicable[ TEXT | BINARY ]
Ground MotionPeak Ground Acceleration10% in 50 Years[ TEXT | BINARY ]
Ground MotionPeak Ground Acceleration2% in 50 Years[ TEXT | BINARY ]
Ground MotionPeak Ground Acceleration5% in 50 Years[ TEXT | BINARY ]
Hazard Curves0.1 Second (10Hz)Not Applicable[ TEXT | BINARY ]
Hazard Curves0.2 Second (5Hz)Not Applicable[ TEXT | BINARY ]
Ground Motion0.2 Second (5Hz)10% in 50 Years[ TEXT | BINARY ]
Ground Motion0.2 Second (5Hz)2% in 50 Years[ TEXT | BINARY ]
Ground Motion0.2 Second (5Hz)5% in 50 Years[ TEXT | BINARY ]
Hazard Curves0.3 Second (3.33Hz)Not Applicable[ TEXT | BINARY ]
Ground Motion0.3 Second (3.33Hz)10% in 50 Years[ TEXT | BINARY ]
Ground Motion0.3 Second (3.33Hz)2% in 50 Years[ TEXT | BINARY ]
Ground Motion0.3 Second (3.33Hz)5% in 50 Years[ TEXT | BINARY ]
Hazard Curves0.5 Second (2Hz)Not Applicable[ TEXT | BINARY ]
Hazard Curves1.0 Second (1Hz)Not Applicable[ TEXT | BINARY ]
Ground Motion0.5 Second (2Hz)10% in 50 Years[ TEXT | BINARY ]
Ground Motion1.0 Second (1Hz)2% in 50 Years[ TEXT | BINARY ]
Ground Motion1.0 Second (1Hz)5% in 50 Years[ TEXT | BINARY ]
Hazard Curves2.0 Second (0.5Hz)Not Applicable[ TEXT | BINARY ]

Catalog Data

In addition to the output data files below we also make available to you the catalog data used when performing our analysis.

Column Definitions

01-04 magnitude (mb for CEUS, Mw for WUS)
06-14 longitude (degree, east)
16-23 latitude (degree, north)
25-28 depth (km)
30-33 year
35-36 month
38-39 day
41-42 hour
44-45 minute
47-51 second
54-59 name of source catalog